Added Borg Backup

On host/borg-server.md

@@ -0,0 +1,24 @@
+Borg Server / Borg Backup
+===
+#### Install Borg
+```bash
+sudo apt install borgbackup -y
+```
+
+#### Repository initialization on server :
+```bash
+borg init -e none /mnt/data/backup/<repo_name>
+```
+
+#### Repository initialization from distant host :
+
+```bash
+borg init -e none ssh://pleb@krabs/mnt/data/backup/<repo_name>
+```
+> Enter a passphrase to encrypt the folder.
+
+#### Verify the backup folder using the command info:
+
+```bash
+borg info ssh://pleb@krabs/mnt/data/backup/<repo_name>
+```